Changing the spark plugs.....

[lfalzarano]

amen to that!


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[Roadster]

Originally Posted by WARP TEN

I always removed number 8 first, so by comparison all the rest were easy as pie.--Bob

Now that I have the right combo that works for me on #8 and the fact that they are no longer installed way too tight, they are all now as you say,
"easy as pie"

[lfalzarano]

Wait until one blows out on the road. Scary noise


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[lfalzarano]

As a precursor, you might experience a slight rough idle. At least once a month while idling, check the spark plug boots. Any slight movement is an indication of a loose plug that should be tightened after the engine is cold. Otherwise, drive it like you just stole it!


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[Roadster]

Originally Posted by lfalzarano

Wait until one blows out on the road. Scary noise


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I hear you there, read some posts where it has happen to a few members, don't want to be added to that list!!!

Originally Posted by lfalzarano

As a precursor, you might experience a slight rough idle. At least once a month while idling, check the spark plug boots. Any slight movement is an indication of a loose plug that should be tightened after the engine is cold. Otherwise, drive it like you just stole it!


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Thanks for the tip.....I intend to recheck the torque after 50 miles or so, just to make sure...

[efnfast]

Originally Posted by lfalzarano

Wait until one blows out on the road. Scary noise


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Uh huh.

[XfireZ51]

Originally Posted by lfalzarano

As a precursor, you might experience a slight rough idle. At least once a month while idling, check the spark plug boots. Any slight movement is an indication of a loose plug that should be tightened after the engine is cold. Otherwise, drive it like you just stole it!


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I agree. Before some performance event or road trip, I usually tighten things up
assuring good compression.

[Roadster]

Ok, could not contain myself any longer.....so the roads are halfway decent and I went for a ride with my new sparkplugs....I like them a lot.
Even though the cold temps @ 33* helps with power, I have to say these new plugs are extremely responsive. Pulls effortlessly through all the gears, feeling like more added power even besides the secondaries now being fully operational.

Now for a few slight (have to figure out) items....
1- Got into it in 1st gear getting the r's close to 5k, and it felt like the accelerator pedal kicked back towards my foot. Shifted into 2nd & 3rd, brought the r's up again, was fine. Tried it again after a mile or so, did not do it that time. All future heavy throttle in 1st gear did not duplicate the kickback. Thought that was kind of unusual....

2- I noticed that when the plenum pull was done, and the vacuum issues were addressed, when first turning the key to the on position to hear the vacuum pump, it only came on for about 2-3 seconds. Today when first started, it stayed on for 3-5 seconds. All repeat "hot" starts just turning the key to the on position did not activate the pump at all.

3- Reason #2 has me concerned is that the idle is still not quite right. And at one time today, it did go as high as 1200 r's when I came to a stop. Sometimes it will idle at 650-700 r's when stopped, other times it will be at 900-1000 r's when stopped.
If I am stopped with trans in 1st gear, and idle is higher and I let the clutch out slightly with my foot on the brake, as soon as the clutch starts to engage, the idle will drop to normal and stay there even as I press down on the clutch pedal to disengage.
I know that there may be a couple of things to look for, as has been mentioned before, such as: the throttle blades completely closing, or a slight vacuum leak due to a vacuum hose coming loose under the plenum. Although the digital camera showed everything looking good from before....

Engine runs great, the best since I have owned the Z, once the idle issue gets resolved, it will be complete.....at least for me!!!

[lfalzarano]

Have you upgraded your chip?

http://www.zr1specialist.com/HAT%20W...on%20BMCBG.htm It will help with the idle and throttle issues you mentioned.

[Roadster]

Yes I have, it was the first item I did when I purchased the Z 3 years ago....
It was normal before the plenum pull....that's why I think it maybe a hose that has come loose as the pump runs a little longer as stated above.
Throttle is perfect, closes @0% and opens to 100% @ WOT, as per the Tech 1.


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